Stereoradioscope



Aug. 12 1924. 1;'5021389" B. L. SPITZER 'sTEREoRADIosCorE Filed April 8. 1921 15 negatives depth4 by the utilization of the Panarea Aeg. 12, 1924.

PATIENT onirica.

BENJAIIN n Smm, or New You, n. Y.

s rmomnroscorn Application tiled April 8, 18,21. Serial ll'o. 459,778. j

' To all whom it may concern:

Be it known that I, BENJAMIN L. Sr'rrznn, a citizen of the United States, and resident of the borough of Manhattan, city,.county, and State of New York, have invented certain new and `useful Improvements in Stereoradios'copes).`

This invention relates .toimprovements.

in vdevices for viewing and examining negatives and its principal objectl is to provlde a device by which dental X-ray negatives commonly known as radiographs, may be examined.

Another object of the invention is tov provide a device wherein it is possible to give stereoradioscope principle and I so construct my instrument that one end may be utilized to view a single negative while the other end is provided with a binocular for examining. a pair of negatives. The pair of negativesl may be from the same film pack that is, a pair of negatives taken on one exposure or may be preferably two negatives radiographed stereoscopically that is, the exposures being made at an angle to each other, the preferred differences being approximate* ly a 2l inch.- shift of the posltion of the X- rav tube.

Beside producing considerable magnification the inocular stereoscopic method of examining dental radiographs brings out to an appreciable degree the three dimensions in the negative. Another object of the present invention resides in the provision of a radiograph examining apparatus which is provided withl ex lanation windows so that the party utllizing the apparatus may' readily explain to his patient the conditions as shown by the X-ray negative. l

Still another object of the invention resides in the provision of a means for varying the brilliance of the illuminating` means so specification, claimedmd "illustrated in the accompanying drawings .in which Fig. 1, is a perspective view of this improved radioscope.

Fig. 2, isa longitudinal sectional view through Fig. 1.y j f Referring to the drawingsin detail the numeral 5 designates the base of the device provided with a'yoke 6 in 'which the barrel or c linder 7 is ,mounted on suitable screws 8 w ich may be tightened 'or loosened to permit of ready adjustment'o'f Ithe cylinder. Formed between the center? and opposite ends of the barrel are the slots 9' and 10 which extend transversely through the barrel and provide the receiving guides for the negatives and mounts indicated at 11.

Arranged centrally within the barrel is a lamp socket 12 for the reception of a suit- .able lamp bulb 13 and one end of the barrel is closed .by a capv 14 provided with a centrally disposed opening to receive the magnifylng lens 15. The opposite end of the barrel is closed by a cap 16 carrying the adjustable binocular or stereoscopic lenses 17 which may be moved inwardly or outwardly by means of the rack and pinion 18 and 19, it being understood that the pinion is secured'to the inner end of a shaft 20, the outer end of which projects through a'relatively short longitudinal slot 21 formed in the barrel 7 adjacent the end closedby the cap 16. j The extreme outer end of the shaft 20 is provided with a thumb piece 22 by which it may be easily operated to adjust the binocular.

In order to provide a means for admitting a pointery to the interior of the device and rto enable the user to indicate various parts or conditions of the objects shown on the radiograph, an explanation window 23 is arranged adjacent each of the slots 9 and'LO and each of said windows is provided with a sliding cover 24 by which it may be closed.

The lamp socket 12 is connected by means of a flexible cable 25 toa rheostat 26 provided with a thumb piece 27 by means of j which the current passing through the lamp mey be regulated.

n operation ,the user places negative in the slot 10 or a pair of stereoscopic negatives in the slot 9 depending upon which end of the device he desires to use and the lamp 13 isthen lighted and upon .a l single v through the exp 'if Aumfununb piece 27 the lightmy be dimme .forja-thin negative or made more brilliant for a densene tive so as to show the negatives l"at'their .highest eiiiciency.

The user may then by a pointer through through the 'explanation window point out to hls patient the various conditions as shown upon the negative, obviouslljyiv the strong light behind the negative w' overcomeany 1i ht which ma be admitted anation win ow so that -a clear showing at all times ma be had.

' While` in the foregoing t ere has been l shown and described a preferred embodi-v mentof this invention, it 1s to be understood 'that'certain changes '1n the-details of construction may beresorted to without departing from the spirit and scope of the inven.

tion.'l

" What is A'claimed is.:- 4

k1. Aninstrument of the character described comprising a tube havin ne ative receiving Yslot'sfnearv opposite en i luminating means arranged 1n the tube between 25' magnifying'means at opposite ends of the tube through whichnegatives laced in the slots may beiviewed,jone of sai the slots and 'in line with the negative and l magnifying means being stereoscopic. j

2. VAn instrument -of the :character describedI comprising' an adjustable tube, -illuminating means mounted intermediate the t1ve. v

3.v radioscope comprising an adjustable tube, illuminatlng means interior of and intermediate its ends, said tube having a negative receiving slot near one end. andl magnifying' means in the end adjacent the' slot ythrough which a negative placed in the slot may be viewed, an extension atthe opposite end of the tube having a` negative receiving slot therein, and a pair. of stereoscopic eye pieces adjustably mounted at the end of the extension whereby negatives placed 1n the last named slot and depth lent to the image t ereon, and

nating means.

Signed in the city, New York, this day of means to vary the intensity of the illumi county and State of Jan. 31, 1921. V

BENiiiMIN L. srrrzER.

ereof, said tube n aperma be viewed l 

